Steam-discharge piece for injectors



Aug. 12,l 1924. 1,504,468

vL. FRIEDMANN STEAM DISCHARGE PIECE FOR NJECTORS Filed May 5, 1922 Patented Aug. 12, 1924.

LOUIS FRIECDMANN, 0F VIENNA, AUSTRIA.

STEAM-DISCHARGE PIECE FOR INJEC'IORS.

Application filed Mar 3,

To all 'whom it may concern.'

Be it known that I, Louis FRIEDMANN, manufacturer, a citizen of the Republic of Austria, and residing at Vienna, Austria, have invented new and useful Improvements in Steam-Discharge Pieces for Injectors, of which the following is a specification.

This invention relates to injectors for feeding boilers, provided with two steam nozzles, arranged so as to surround each other, thus forming an outer steam nozzle and a concentric inner nozzle, and consists in particular of a steam discharge piece consisting of three parts an outer steam nozzle, an inner steam nozzle and a collar or ring piece and constructed in such a manner, that the latter which is most exposed to wear is formed by a small annular-piece which may be easily manufactured with small costs.

The accompanying drawing shows in Fig. 1 an injector provided with a steam discharge piece according to the invention, Fig. 2 shows one modification of the steam discharge piece as represented in Fig. 1 onV a larger scale, Figs. 3 to 6 show different modifications of the arrangement. In the drawing 1 denotes a part for supporting the nozzles and which will be termed hereinafter the nozzle carrier; this part is fixed in some suitable manner to the casing of the injector at the side facing the steam inlet. This nozzle carrier is provided on its outer surface at the end remote from the steam inlet with threads 2. 3 is the outer steam nozzle, which can be fiXed to the nozzle carrier by means of screw threads, 4 designates the inner steam nozzle arranged (3o-axially with the outer one and provided with a collar 5, which is retained between the outer nozzle and the nozzle carrier. The inner steam nozzle with its collar may be supported either by the nozzle carrier as shown in Figs. 2 and 3 or in the outer steam nozzle as shown in Fig. 5. By screwing the outer steam nozzle tightly down on the nozzle carrier the inner steam nozzle is immovably fastened. The collar of the inner steam nozzle is pro-VV vided with bores or holes 6 to permit the steam to enter into the annular space between the outer and the inner steam nozzle. The

collar 5 may also be provided with recesses 1922. Serial No. 558,288.

The area of the inner section of the outer steam nozzle and the outer periphery of the y inner steam nozzle are chosen in such a manner, that an annular space isformed between the two steam nozzles the smallest section 8 of which is smaller than the section of all the holes or. bores 6 or of the openings 7 whereby the throttling of the steam is effected at 8.

The nozzle carrier itself carries a ring or collar 9 pushed or screwed in from the inside and consisting of nickel or a similar hard and steam resisting material, which forms a seat for the steam valve 10 in the event of such a valve being employed. The inner steam 'nozzle abuts on the piece 9 carrying the valve seat and is therefore clamped tightly between the outer steam nozzle and the valve seat, when the outer steam nozzle is screwed down on the nozzle carrier. Therefore when the outer steam nozzle is screwed down on the nozzle carrier, the removable valve-seat 9 as well as the inner steam nozzle 4 are immovably fixed by this operation.

What I claim is:

l. A steam discharge piece for injectors comprising a nozzle carrier provided on its outer surface with threads, an outer steam nozzle fixed to the nozzle carrier by the said threads, an inner steam nozzle, a collar provided on the inner steam nozzle and arranged between the nozzle carrier and the outer steam nozzle and fastened by the screwing together of these parts, the said collar being provided with openings for the inlet of the steam into the annular space between the two steam nozzles` the whole area of the openings being larger than the smallest annular space between the outer and the inner steam nozzle.

2. A steam discharge piece for injectors consisting of a nozzle carrier provided on its outer surface with threads, an outer steam nozzle connected to the nozzle carrier by the said threads, a valve-seat inserted into the nozzle carrier from the inside, an inner steam nozzle, a collar provided on the inner steam nozzle and fastened between the outer steam nozzle and the valve-seat by screwing the nozzle carrier to the outer steam nozzle, the sald collar belng provlded Wlth openlngs for the entrance of the steam into the an- 4 T nnlar kepaoe between the two steam nozzles LOUIS FRIEDMANL 5 the area of all the openlngs berng larger Vltnesses:

than the smallest area of the annular space CARI, CONSTENBERG,

l between the outer andthe inner steam nozzle. MARTHA TEMKERCANU.

In testimony whereof I have signed my name to tlns speclleatron. 

